(2R,3R,3aR,6S,7R,7aR)-7-azido-2-(5'-iodo-2',4'-dioxo-3',4'-dihydro-2H-pyrimidin-1'-yl)-6-methoxy-3-pivaloyloxy-hexahydrofuro[3,2-b]pyran

2,2-Dimethyl-propionic acid (2R,3R,3aR,6S,7R,7aR)-7-amino-2-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-6-methoxy-hexahydro-furo[3,2-b]pyran-3-yl ester

(1'R,2R,3R,4S,5S)-4-azido-2-(1'-hydroxy-2',2'-bis-phenylsulfanylethyl)-5-methoxy-tetrahydropyran-3-ol

(2R,3R,3aR,6S,7R,7aR)-7-azido-2-(6'-benzoylamino-purin-9'-yl)-6-methoxy-3-pivaloyloxy-hexahydrofuro[3,2-b]pyran

2,2-Dimethyl-propionic acid (2R,3R,3aR,6S,7R,7aR)-6-methoxy-2-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-7-[3-(2,2,2-trichloro-acetyl)-ureido]-hexahydro-furo[3,2-b]pyran-3-yl ester